<!--
 * @Author: your name
 * @Date: 2019-12-24 11:41:25
 * @LastEditTime : 2019-12-24 14:15:53
 * @LastEditors  : Please set LastEditors
 * @Description: In User Settings Edit
 * @FilePath: \vue-components\upload-img-demo\src\components\cropper-img.vue
 -->
<template>
  <div class="container">
    <div class="cropper-content">
      <div class="cropper">
        <vue-cropper
          ref="cropper"
          :img="option.img"
          :outputSize="option.size"
          :outputType="option.outputType"
          :info="true"
          :full="option.full"
          :canMove="option.canMove"
          :canMoveBox="option.canMoveBox"
          :original="option.original"
          :autoCrop="option.autoCrop"
          :autoCropWidth="option.autoCropWidth"
          :autoCropHeight="option.autoCropHeight"
          :fixedBox="option.fixedBox"
          @realTime="realTime"
          @imgLoad="imgLoad"
        ></vue-cropper>
      </div>
      <div
        class="show-preview"
        :style="{'width': previews.w + 'px', 'height': previews.h + 'px',  'overflow': 'hidden', 'margin': '5px'}"
      >
        <div :style="previews.div" class="preview">
          <img :src="previews.url" :style="previews.img" />
        </div>
      </div>
    </div>
    <div class="footer-btn">
      <div class="scope-btn">
        <label class="btn" for="uploads">更换图片</label>
        <input
          type="file"
          id="uploads"
          style="position:absolute; clip:rect(0 0 0 0);"
          accept="image/png, image/jpeg, image/gif, image/jpg"
          @change="uploadImg($event, 1)"
        />

        <button @click="changeScale(1)">+</button>
        <button @click="changeScale(-1)">-</button>
        <button @click="rotateLeft">↺</button>
        <button @click="rotateRight">↻</button>
      </div>
      <div class="upload-btn">
        <button @click="down('blob')">下载</button>
      </div>
    </div>
  </div>
</template>

<script>
import { VueCropper } from "vue-cropper";
export default {
  data() {
    return {
      crap: false,
      previews: {},
      option: {
        img:
          "http://img1.vued.vanthink.cn/vued751d13a9cb5376b89cb6719e86f591f3.png",
        size: 1,
        full: false, //输出原图比例截图 props名full
        outputType: "png",
        canMove: true,
        original: false,
        canMoveBox: true,
        autoCrop: true,
        autoCropWidth: 200,
        autoCropHeight: 200,
        fixedBox: true
      },
      downImg: "#"
    };
  },
  methods: {
    changeScale(num) {
      num = num || 1;
      this.$refs.cropper.changeScale(num);
    },
    rotateLeft() {
      this.$refs.cropper.rotateLeft();
    },
    rotateRight() {
      this.$refs.cropper.rotateRight();
    },
    finish(type) {
      // 输出 // var test = window.open('about:blank') // test.document.body.innerHTML = '图片生成中..'
      if (type === "blob") {
        this.$refs.cropper.getCropBlob(data => {
          var img = window.URL.createObjectURL(data);
          this.model = true;
          this.modelSrc = img;
        });
      } else {
        this.$refs.cropper.getCropData(data => {
          this.model = true;
          this.modelSrc = data;
        });
      }
    }, // 实时预览函数
    realTime(data) {
      this.previews = data;
    },
    down(type) {
      // event.preventDefault()
      var aLink = document.createElement("a");
      aLink.download = "author-img"; // 输出
      if (type === "blob") {
        this.$refs.cropper.getCropBlob(data => {
          console.log(data);
          this.downImg = window.URL.createObjectURL(data); // aLink.download = this.downImg;
          console.log(this.downImg);
          aLink.href = window.URL.createObjectURL(data);
          aLink.click();
        });
      } else {
        this.$refs.cropper.getCropData(data => {
          this.downImg = data;
          aLink.href = data;
          aLink.click();
        });
      }
    },
    uploadImg(e, num) {
      //上传图片
      // this.option.img
      var file = e.target.files[0];
      if (!/\.(gif|jpg|jpeg|png|bmp|GIF|JPG|PNG)$/.test(e.target.value)) {
        alert("图片类型必须是.gif,jpeg,jpg,png,bmp中的一种");
        return false;
      }
      var reader = new FileReader();
      reader.onload = e => {
        let data;
        if (typeof e.target.result === "object") {
          // 把Array Buffer转化为blob 如果是base64不需要
          data = window.URL.createObjectURL(new Blob([e.target.result]));
        } else {
          data = e.target.result;
        }
        if (num === 1) {
          this.option.img = data;
        } else if (num === 2) {
          this.example2.img = data;
        }
      }; // 转化为base64 //
      //reader.readAsDataURL(file); // 转化为blob
      reader.readAsArrayBuffer(file);
    },
    imgLoad(msg) {
      console.log(msg);
    }
  },
  components: { VueCropper }
};
</script>

<style lang="scss">
.container {
    width: 700px;
  .cropper-content {
    display: flex;
    display: -webkit-flex;
    justify-content: flex-end;
    -webkit-justify-content: flex-end;
    border: 1px solid pink;
    .cropper {
      width: 350px;
      height: 300px;
    }
    .show-preview {
      border: 1px solid purple;
      flex: 1;
      -webkit-flex: 1;
      display: flex;
      display: -webkit-flex;
      justify-content: center;
      -webkit-justify-content: center;
      .preview {
        border: 1px solid skyblue;
        overflow: hidden;
        border-radius: 50%;
        border: 1px solid #cccccc;
        background: #cccccc;
        margin-left: 40px;
      }
    }
  }
  .footer-btn {
    margin-top: 30px;
    display: flex;
    display: -webkit-flex;
    justify-content: flex-end;
    -webkit-justify-content: flex-end;
    .scope-btn {
      width: 350px;
      display: flex;
      display: -webkit-flex;
      justify-content: space-between;
      -webkit-justify-content: space-between;
    }
    .upload-btn {
      flex: 1;
      -webkit-flex: 1;
      display: flex;
      display: -webkit-flex;
      justify-content: center;
      -webkit-justify-content: center;
    }
    .btn {
      outline: none;
      display: inline-block;
      line-height: 1;
      white-space: nowrap;
      cursor: pointer;
      -webkit-appearance: none;
      text-align: center;
      -webkit-box-sizing: border-box;
      box-sizing: border-box;
      outline: 0;
      margin: 0;
      -webkit-transition: 0.1s;
      transition: 0.1s;
      font-weight: 500;
      padding: 8px 15px;
      font-size: 12px;
      border-radius: 3px;
      color: #fff;
      background-color: #67c23a;
      border-color: #67c23a;
    }
  }
}
</style>